Schneider Electric (Erie) AT33A000 Actuator

The Schneider Electric (Erie) AT33A000 Actuator is a field-proven 24Vac three-wire floating signal motor designed for precise control in hydronic systems. As a key component of the Erie PopTop series, this non-spring return unit is engineered for reliable modulating zone valve operation in fan coil units, VAV reheat, and baseboard applications. It features a magnetic clutch that protects the gear train from binding, effectively extending the service life of the synchronous motor drive by preventing motor burnout during locked-rotor conditions.

Built for the rigors of commercial HVACR environments, the AT33A000 provides a rotary mechanical movement without an internal time-out feature, necessitating the use of a controller that manages signal duration. Its NEMA 1 thermoplastic enclosure and PopTop mounting system allow for rapid, tool-free installation or replacement directly onto the valve body after the piping is complete. This Erie zone valve actuator is the industry standard for contractors requiring a high-torque, durable solution for precise fluid flow management without the need for complex linkages or field calibration.

• Synchronous Motor & Magnetic Clutch: Minimizes gear wear and prevents internal damage during stall conditions.
• PopTop Quick Release: Allows for one-handed installation and removal, reducing service time in tight mechanical spaces.
• Manual Operating Lever: Features a position indicator to facilitate field testing and system commissioning.
• Universal Compatibility: Fits standard 1/2-inch to 1-inch valve bodies often found in fan coils and air handlers.
• Terminal Block Connections: Simplifies wiring compared to pigtail leads, ensuring secure 24V connections.

• Can this actuator replace a spring-return model? No, this is a non-spring return unit; it will maintain its last position upon loss of power rather than returning to a default fail-safe position.
• Does this model include an end switch? The AT33A000 is a standard floating model and typically does not include an auxiliary end switch.
• What happens if the controller doesn't have a time-out function? This actuator requires a controller with time-out logic, as it does not have an internal shut-off, and the magnetic clutch will slip indefinitely if power is maintained.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.